Thank you everyone for your input on the topic!
NebWeb:
I am happy I am not the only one dealing with those issues... I really see myself in your text. And about the video link, indeed, nothing special about his tone.. It sounds cheap to be honest.
aaron_aardvark & NebWeb:
I don't think my Marshall colours my sound, or at least not a lot. I really tried to make it as invisible as possible so that the main tone I hear would be the XT.
I do have a CD-in but either there is a problem with it or it's been programmed by an lollipop. When I try to play music through it, I only hear a sort of blurry woom---woom... Imposible to hear a HH for ex. Plus, even if it worked as planned, I find it very inconvenient as there is no volume / master setting to control it. Also, no EQ. Indeed, the EQ only controls the guitar-in channel.
Actually I am sort of thinking my tone is not that bad after all.. I have watched the second video and again, sounds really cheap to me. I'll try to record a short video of me playing clean / distortion, harmonics etc so you can "see" what it sounds like. But in the meantime, if you want to have an idea, you can hear it here.
On the first video (Steel Panther - Asian Hooker) , I tried using a new preset, of which I am not convinced at all.. If you compare it with the other ones, it sounds less precise there is too much low-mid. I tried to adjust it but haven't found the sweet spot yet.
On the second video (Steel Panther - Eyes of a Panther), I think that was my favourite preset.
On the videos 3 to 15 (Van Halen - Jump to Dokken - Don't Lie to Me), it was my old preset, which I sort of liked, but again, not 100%. The other videos are irrevelant because they are either too old and the recording sucked (even more than the recent ones) or it was recorded in a recording studio, where I got a super killer sound (video 16 : David Lee Roth / Steve Vai - Ladies Night in Buffalo), which of course I can't get at home.
My recording "method" is pretty simple :
I start the original song (medium volume) and play over it (high volume). The video and sound are both recorded using my iphone's camera app (hahah I know...), and then, that's it. I export it as is, no editing.
Feelnofrets:
Yea.. I think you have a point. Maybe it's as close as it gets to a real amp.
That tone is really close to what I am looking for
Rhythm
Lead